Bar for foundry flasks



C. H. ESTES BAR FOR FOUNDRY FLASKS May 3 1927.

Filed llay 18, 1925 lllllllllllllllllllllh.

ink/ raft? Patented May 3, 1927 UNITED STATES PATENT "OFFICE."

CLARENCE H. ESTES, OF CHICAGO HEIGHTS, ILLINOIS, ASSIGNOR '.[0 AMERICAN MANGANESE STEEL COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF MAINE.

BAR Fen. FOUNDRY rLAsks.

Application filed May 18, 1925. SerialNo. 30,968.

Thisinvention relates to bars which are arranged transversely between and supported upon opposite walls of a foundry flask for the purpose of subdividing the flask into compartments, and providing means to prevent the body of sand which constitutes the mold from dropping out of the flask. Heretofore it has been the practice to place bars in bridging relation to the opposite sides of a molding flask and to'suspend from these bars so-called gaggers which slip down to nearly the lower plane of the flask and support the sand against falling out. But this method is objectionable in that it often prevents satisfactory ramming of the mold and adds to the difficulty of shaking out the sand of the mold.

The present invention has for its object to provide a flask bar which may be used in any desired number, and which, while very effective in preventing the sand from falling through, will improve the ramming character of the mold and facilitate shaking out the sand when the mold is inverted.

The present invention proceeds upon the principle of providing a bar in the form of a partition or subdividing wall having a length which adapts it to fit between opposite walls of a flask, and equipped for supporting it in the flask; said bar having a formed upon its lower marginal portion lugs downwardly increasing in width and with upwardly enlarging spaces between them, said lugs being inwardly inclined from the vertical plane of the bar and designed to present to the vertical load of the sand a plurality of inclined faces between whichthe sand will wedge and pack and which will prevent the body of sand, after it has been with spaced dovetailed lugs inclined alternately in opposite directions. Preferably,

one face of the bar will be provided with one or more horizontal ribs which stiffen the bar and serve as a further resistance to slipping of the body of sand; and preferably also the means for mounting the bar in the flask consists of a pair of end flanges slotted in the longitudinal direction of the support ing sides and receiving attaching bolts,

packed, from falling through the flask, also mounted in the latter, in a manner to render the bars adjustable with respect to distances I between the bars or bet-weena. bar and an end wall of the flask.

which- Figure 1 is a bottom plan view of a mold the flask bars in a plane indicated by the line 2 X of Figure 1. j

Figure 3 is a vertical transverse section 'on the line 99-8? of Figure 2.

. A represents a molders flask of known constructlon, and B represents flask bars mounted in bridging relation between theside walls of the flask A and in a relation to subdivide the latter into a plurality of mold forming spaces. Each bar B consists of a vertical plate-like body portion 1, preferably formed on one face with sand sus taining ribs 2, end flanges 3 having slots 4 that receive bolts 5 as the means for securng the bars in the flask, and sand sustaining lugs 6 spaced at suitable'intervals along the bottom margins of the bars B and In order that the invention may be fti lly understood, the preferred embodiment is shown 1n the accompanying drawing, in

deflected alternately in opposite directions in to the sand-receiving spaces of the flask, and thus providing along the opposite confines of each flasksubdivison, inclined faces 7 which receive the vertical load of the com- 'pacted body of sand and resist displacementof the-latter, by wedging action that both renders the lugs effective in their sustaining function, and facilitates release of the body of sand when the flask is inverted, partie ularlyif the securing bolts 5 of one bar be loosened and the bar is slightly backed away from the sand.

I claim:

1. A bar for molders flasks, consisting of a supporting. member and lugs located at spaced intervals along the bottom margin of said member and inclined inwardly into the mold-forming space defined by the bar; said lugs enlarging downwardly.

2. A bar for molders flasks, comprising a supporting member constructed; along its bottom margin with spaced lugs inclined to the plane of the bar; said lugs enlarging downwardly and the spaces between them enlarging upwardly.

3. A bar for molders flasks, consisting of a supporting member having end flanges slotted to receive sustaining bolts, and having along its lower margin, at spaced inter vals, inwardly inclined downwardly enlarg ing lugs.

4. A bar for molders flasks, consisting of a vertical plate-like supporting member and lugs of dove-tail form located at spaced intervals upon the lower margin of said 1nember and inclined inwardly into the moldforming space defined by the bar.

5. A bar for molders flasks, comprising a vertical plate having supporting flanges at its ends in positions to abut against opposite walls of a flask; said flanges being provided with. substantially horizontal slots adapted to receive bolts for supporting the bars in the flask; and said plate being constructed upon its lower margin with lugs of dove-tail form extending inwardly into the forming space defined by the plate.

Signed at Chicago Heights, Illinois, this 25 day of April, 1925.

CLARENCE H. ESTES. 

